fix: remove BinaryPath requirement for Whisper.NET provider (#66)

Author: sirkirby

src/Features/Audio/Services/AudioConfigurationValidator.cs

@@ -35,7 +35,7 @@ public IReadOnlyList<string> GetMissingConfiguration(AudioOptions configuration)
             {
                 SttProviders.BuiltInLocal => "STT Model (required for built-in local provider)",
                 SttProviders.OpenAI => "STT API Key and/or Model (required for OpenAI provider)",
-                SttProviders.WhisperCpp => "Binary Path and/or Model (required for whisper.cpp provider)",
+                SttProviders.WhisperCpp => "Model path (required for Whisper.NET provider)",
                 _ => $"Configuration incomplete for {configuration.SttProvider} provider"
             });
         }

src/Shared/Options/AudioOptions.cs

@@ -193,11 +193,10 @@ public bool IsConfigured()
             return !string.IsNullOrWhiteSpace(apiKey) && !string.IsNullOrWhiteSpace(model);
         }
 
-        // WhisperCpp needs binary path and model
+        // WhisperCpp (Whisper.NET) only needs model path - no external binary required
         if (SttProvider == SttProviders.WhisperCpp)
         {
-            var binaryPath = GetSttBinaryPath();
-            return !string.IsNullOrWhiteSpace(binaryPath) && !string.IsNullOrWhiteSpace(model);
+            return !string.IsNullOrWhiteSpace(model);
         }
 
         return false;